In this situation, the tables (Group #1 field and the record in the Details section) are not necessarily related. Find the fields that have a common value between the two tables and add that to the Select Expert.

For example:
Group #1 field = PjGLPj_ProjectID
Field in Details = PjTran_1Dst_1_Amount
Common fields: PjGLPj_ProjectID and PjTran_1Dst_1_ProjectID
  1. In the Crystal Reports application, go to Report > Selection Formulas > Record
  2. Enter the formula: {PjGLPj.PjGLPj_ProjectID} = {PjTran_1Dst_1.PjTran_1Dst_1_ProjectID}
  3. Click Save and Close
  4. Refresh the report